Improvement in locomotive engines



@nimh -f gstent @frn IMPROVEMENT IN LocoMoTtvE ENGINES.

@tige Ctlgelmle tefetteh te in tlgese vettet htent mit nieltiltgvyntt uf tige same.

TO ALL WHOM I'l MAY CONCERTI: l

Be it knoivn thatlI, JOSEPH M.v GOALE, of the city and county of Bultimorann'd State of`Ma1'y1and,-have invented certain new and useful. improvements in Locomotive and other similar- StcznnBoiler's; and I do hereby declare the following to be a full, clear, nnd'eignct-description ci' the see-lne, reference being had to the accompanying drawing, making a part ot' this specification, and n hich'represents'a longitudinal vertical section through :e locomotive steam boiler, and which fully illustrates my invention.

In locomotive boilers the exhaust steam iniincnces thedraught-te'such an extent that after every exhaust cold air rushesiin to take the place of' that sol suddenly driven out., and this nir entering into thewends of the flues chills them, and thus detracts from the making of steam'.

My invention consists' in vproviding avchnmher or spacevbeliind the extreme ends of the ilues, into which 'chamber the cold air may rush, but where itA will be allowed to expand and be heated enough to prevent its *further cooling the ilues, and particularly where the fines are surrounded by orincontuct with the water in' the boiler, as w-ill be explained.

au a represent a seriefof 'lnes lin a locomotive boiler,'wliich may be surrounded by water in the usual wuy. As heretoforelconstructed.there fines a terminated in' the finie-sheetc, or in the flue-chamber'. The exhaust 'steam drivingl out the uir,.smoke, fi-nd gases from the flue-chambermekes a partial vacuum which instantly fills withithc cold external air, and this cold air rushes'in withsuchforce :is to enter the `ends of the lines or luc pipes and .chill them, and thus chill or prevent them from generating steam in the weit-er surrounding these ends. To avoid the cold air fromtlnis entering the ends'of tliel'ues I attach to the flue-sheet c u second sheet, cl, so as to form a space 0r chamber, e, between the two sheets', and in the second sheet c'I arrange a. series of short ue p'ipes or tubeshfrvvhich` lextend into the -sprkehnmheez The wetter in the :boiler extends no further than the Hue-sheet c, and the inrushing cold air will enter the pipes or fines f and be partially heat-cd therein, and then expanding and spreading through the chamber e, in which there is a. high ldegreeof heat, will become so heated and have been so checked as not to enter the ends of the flucsa a at all, but particularly not in its cold condition. The chilling of' the pipes or flues f in nonise4 acctsthe' gcnern'tion of steam, as they are not in contact with the water, and then the air becoming again heated in the, chamber e it haslost `a'll of its inju- 'rious effects npon the tlnesa, if even it should reach them. By this contrivance, which may be readily attached to any locomotive boiler, ngreat saving of fuel is attained. If thc'luesf be of considerable lengthfthe chamber may be contracted. Y

Having thus fully described my invention, what I claim, is t In combination with locomotive and other similar boilers the additional sheet d and luesf, for the purpose of preventing the cold air from chilling the ends of the Hues proper, substantially as and for the purpose set forth.

JOSEPH M. OOALE.

Witnesses:

H. R. LINmHIcUM, W. McGonMIc. 

